It sounds like a plot concocted by Alfred Hitchcock: cockroaches nestling inside oxygen masks in a hospital intensive care unit and crawling around in the light panels hanging from the ceiling.

But this was no horror film.

Swiss doctors have reported finding cockroaches in the ICU of the University of Geneva Hospitals in the summer of 2006. When the problem was first discovered, hospital workers spotted about 30 of the reviled bugs, the authors revealed in a report to the journal Emerging Infectious Diseases.

"The first time we saw that we were horrified. We said: 'My God! What's going on?' " said Didier Pettit, senior author of the report and head of the hospital's infection control team.

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